Self-loading device for shaker conveyers



Dec. 30, 1952 J. H. HOLSTEIN SELF-LOADING DEVICE FOR SHAKER CONVEYERS Filed Jan. ll, 1947 5 Sheets-Shea?. l

Dec 30, 1952 J. H. HOLSTEIN sELF-LoAD1NG DEVICE FOR SHAKER coNvEYERs Filed Jan. 11, 1947 5 Sheets--SheeI 2 DeC- 30, 1952 J. H. HOLSTEIN SELF-LOADING DEVICE EOE SHAKER coNvEYERs Filed Jan. 1l, 1947 5 Sheets-Sheet 5 ww ww.

v Dec. 30, 1952 J, H. HOLSTEIN SELF-LOADING DEVICE FOR SHAKER CONVEYERS 5 Sheets-Sheet Filed Jan. l1, 1947 lvg NTOIL john/H Hdsjem/ @it Urn@ J. H. HOLSTEIN SELF-LOADING DEVICE FOR SHAKER CONVEYERS Filed Jan. ll, 1947 Dec. 3o, 1952 5 Sheets-Sheet 5 Patented Dec. 30, A1952 UNITEDY STA-TES PATENT OFFICE SELF-LOADING DEVICE FOR: SHAKER.'

CONVEYERS V Claims., (Cl.`198;2 20) This linvention relates to improvementsin self-` loading devices for shaker conveyors and, more particularly relates to aself-loading devicelin which the pick-up member or shovel on theforwardV end of the extensible Atrough of the con-` veyor may beextendedfora greater distance than the length of the extensibletroughwithf. out inserting additional troughs in thestrough` line.

The principal objects ofmy-invention areto provide Va self-loading device-for shaker conveyors including a non-reciprocating frame forming a guide for the reciprocating aandiex.- tensible troughs of the-conveyor, and so` ar-` ranged as to swing thereciprocatingand extensible troughs of-the `conveyorz-laterally`upon` lat-l eral movement of said frame, and to extend itselfV whenthe extensible trough hasbeenextended for the full length lof its traveL;Y soA as to permit extension of Asaid extensible trough-,for a greater distance than-itslength, withoutinserting additional troughs in the trough; line.

In carrying out my invention l` connect `a reciprocating trough-to theinby end-:of a swivel in aqshaker conveyor trough line so` as to permit said trough to move laterallyI with-respect to the trough line. I also nest` an, intermediate trough within this reciprocating trough, and mount this intermediate trough for telescopic movement with respect tothe` reciprocatingtrough, and provide a releasable` `drive connec. tion between these troughs, whichis arranged to reciproeably drive: theV intermediate :trough and to lpermit its extension along. the. reciprocating, trough. A feeding device operated bythe action of the conveyor is mounted` on the forward lend ofthe intermediate trough 4to extensibly 1oril retractibly. move-the extensible trough with respect to the intermediate trough. I further prof vide an extensible guide frame forthesetroughs which is connected .to theswivel at its rear end," for.` lateral swinging movement with respect thereto, for laterally swinging said troughsabout i saidswivel upon lateral movenrentof said frame,` and, extend l this .trarne by they reciprocating ace. tion ,ofthe `conveyor and extend theinterme.-r diate trough along the reciprocating trough,V to permit extension ofthe extensible troughyfor a, greater distance than its length without` insertf ing additional troughs in the itrough` line.`

These and other objects of` my` invention will. appear from time to time as the follpwing.:speci-` cation proceeds; and withsreference 4;to `the fac.- cmpanying drawings. wherein:

Figure .1. is` a view in,side,elevati/ori.. of: the;

forward part of a self-loading device conf structed in accordance with my invention;

FigureZ is acontinuation of Figure 1 show' ing the rear part of the self-loading device;

Figure 3 is an enlarged fragmentary viewin side elevation` of the forwardpart of the device shown in Figure 1, with certain parts broken away and with certain other parts shown in substantially longitudinal section;

Figure 4 isan enlarged fragmentary View in side elevation of the rear part of the device shown inFigure 1, with certainparts broken away and certain other parts shown in substantially longitudinal section;

Figure 5 is an enlarged fragmentary `plan View of the forward part of therdevice shown .in Figure 1, with certain parts broken away and with certain other parts shown in ,substantially` horizontal section;

Figure 6' is an enlarged fragmentary plan View of the rear part of the device shown in Figure l, with certain parts broken away and Lwith certain other partsshown in substantially horizontal section;

Figure 7 is an enlarged fragmentary trans.- verse sectional View taken substantially along` line 'l-'l of Figure 5;

Figure 8 is an enlarged fragmentary detail transverse sectional view taken substantially along line 8 3 of Figure 3;

Figure 9 is a fragmentary transverse'sectional View taken substantially along liner 9 9 of Fig-- ure 4;

Figure 10 is an enlarged fragmentaryY transf parts shown in substantially horizontal section in order to show certain details of themeans for applying and releasing the` holding` dog for the extensible frame;

Figure 12 is an enlarged viewin side .elevation with certain parts shown insu-bstantially longitudinal section in order to show` certain details of the means for controlling operation` of the holding dog for the extensible frame,` withthe control lever therefor in position to permitA said dog to be in an engaged position; and' Figure 13 is .a View sornewhatvsinfiilar` to Fig-g ure 12 but showing the control lever in position to release the holding dog to permit retractionofv the extensible frame.

In the drawings, the device embodyingymy-iny vention `is shownas includinga swivel troughlvj,

having a reciprocating trough II connected to the inby end thereof and reciprocably driven therefrom. Said swivel trough may be of a form somewhat similar to that shown in William W. Sloane Patent No. 2,433,961, and may be connected to the inby end of a shaker conveyor trough line (not shown) and reciprocably driven therefrom for providing the continuous flow of material from the reciprocating trough II to the trough line when the reciprocating trough II is yswung to either side of the trough line about the swivel trough I5, and is not herein shown or described in detail since it is no part of my preoent invention.

The reciprocating trough II is reciprocably guided in a non-reciprocating guide frame I 2 connected at its rear end to the swivel trough I!! for lateral movement thereabout, as will hereinafter more clearly appear as this specification proceeds. Flexible feeding mechanisms including a pair of exible cables I4, I4 wound on and paid off of suitable winding drums (not shown) mounted on the base of the swivel trough I9, are trained laterally from the forward end of said swivel trough about guide sheaves I5, I5, to laterally move said frame (see Figure 5). The guide sheaves I5, I5 are mounted on a floating forward end I6 of an extensible portion I1 of the frame I2. The frame I2 forms a guide means and reaction member for the reciprocating trough I I, for an intermediate trough I9 nested in and extensible from the reciprocating trough II, and for an extensible trough 20 extensible from the intermediate trough I9, and serves to move the troughs laterally upon lateral movement of said swivel trough, to position a pick-up member or shovel 2| on the forward end of the extensible trough 25 to pick up loose material from the remote corners at the working face of a mine.

The intermediate trough I9 is nested within and extensible from the reciprocating trough II and is reciprocably driven therefrom by means of friction grip driving devices 23, 23 arranged at opposite sides of the trough I9, to permit extension of the intermediate trough I 9 with respect to the reciprocating trough II and to drive said intermediate trough I9 from said reciprocating trough II in al1 positions of extension with respect thereto. Friction grip feeding devices 1ndicated generally by reference character 24 are mounted at the forward end of the intermediate trough I9 and extend in advance thereof, for extensibly or retractibly moving the extensible trough 20 with respect to the intermediate trough I9. The feeding devices 24 include a carrier member 25 on each side of the extensible trough 20 having friction grip blocks 26, 2S adapted to engage bearing plates 21, 21 extending along and laterally from the upper edges of the extensible trough 25, as usual. Said feeding devices may be of any well known form and are herein shown as being of a type shown and disclosed in William W. Sloane Patent No. 2,454,484, so need not herein be shown or described in detail.

' The extensible trough 29 rests on the ground on the forward end of the shovel 2 I, and is supported above the ground at its rear end on a pair of parallel spaced legs 29, 29 secured to the bearing plates 21, 21 and depending therefrom and transversely pivoted adjacent their lower ends to a ground engaging shoe 30 (see Figure 2). The bearing plates 21, 21 besides being engaged by the grip blocks 25, 25 also form a supporting means for the forward end of the intermediate trough I9 on rollers 3|, 3| which rest on bearing plates 21,21. The rollers 3|, 3| are mounted on opposite upright side walls 52, 32 of a frame 33, which is secured to and extends across the bottom of and upwardly along opposite sides of the forward end of the intermediate trough I9 beyond the upper limits thereof and in advance of the forward end thereof. The frame 33 also has the feeding devices 24 transversely pivoted thereto and extending in advance thereof, as usual.

The intermediate trough I5 has a tubular reinforcing member 34 extending along each upper outer edge thereof. The reinforcing members 34 are adapted to be slidably supported in support brackets 35, 35 secured to and extending upwardly from bearing plates 35, 35, which extend along and project laterally from the upper edges of the reciprocating trough II (see Figure '7). rihe intermediate trough I9 has support brackets 31, 31, which are secured to the reinforcing members 34, 34 adjacent the rear end thereof, and which brackets depend from the members 34, 34 and are like the brackets 35, 35 except that they are secured to the members 34, 34 instead of being slidably mounted thereon. The brackets 31, 31 have inwardly opening lower slotted portions having bearing surfaces 45, 45 provided in the upper and lower faces thereof, which slidably engage the bearing plates 35, 35.

The friction grip driving devices 23, 23 are mounted on brackets 43, 43 projecting outwardly from opposite upper sides of the intermediate trough I9. Said driving devices each include two pairs of opposed friction grip blocks 44 and 45 mounted in opposed inclined carrier members 45 and 41, respectively. The grip blocks 44, 45 are adapted to engage the upper and lower sides of the bearing plates 3S, 35 for reciprocably moving the intermediate trough I9 with the reciprocating trough II, and are arranged to provide extensible or retractible movement of the intermediate trough I9 with respect to the reciprocating trough II, it being understood that the friction grip blocks 44, 44 move the intermediate trough I9 with the reciprocating trough I| during the forward strokes of the conveyor, and that the other of said pairs of friction grip blocks 45, 45 move the intermediate trough I9 with the reciprocating trough II during the return strokes of the conveyor. Said driving devices are the same on each side of the conveyor so need herein be described for one side of the conveyor only, and are similar to those shown and described in my Patent No. 2,344,871 dated March 21, 1944, so will only herein be shown and described in sufcient detail to make my present invention readily understandable.

The carrier members 46, 41 have overlapping ears 49 and 55, respectively, which are pivotally connected to two laterally spaced aligned blocks 5I, 5I at a pivotal pin 53 (see Figure 9). The blocks 5I, 5I are guided in upright rectilinear guides 52, 52 formed integrally with and projecting upwardly from the bracket 43. The carrier members 46, 41 also have depending lugs 54 and 55 respectively, between which are interposed a compression spring 56, encircling a rod 51 slidably mounted in the lugs 54 and 55. The spring 56 tends to move the lower ends of said carrier members away from each other about the axis 0f the pivotal pin 53, and its strength is such as to hold the carrier members 46, 41 in position .to cause the grip blocks 44, 44 to engage the bearing plate 35 and cause movement of the intermediate trough I9 with the reciprocating trough II during the forward strokes of the conveyor, and to causethe grip blocks-.45.y 45 to engagethe bearing plate Stand cause movement of the intermediate troughI I9 with the reciprocating trough II duringthe return strokes of the conveyor, and cause movement of the intermediate trough I9 along the reciprocating trough II when the intermediate trough I9 engages an obstruction during either` a forward or return stroke of the conveyor.

Twolongitudinally spaced yieldable stops 58 and 53, mounted on the extensible portion Il of the frame I2, are provided to engage the lugs 54, 55 andfrelease either of the grip blocks 44, 44 or 45, 45 upon extensible or retractible movement of said frame and cause the reciprocating trough II` to extensibly or retractibly move the intermediate trough I 9 by the other set of grip blocks, which are not released. The stops 58 and 59 are mounted on brackets 65, 5I, respectively, and their i engaging ends face each other and are spaced apart a distance equal to substantially the stroke ofthe conveyor, plus the distance between the engaging ends of the lugs 54, 55, and besides serving as a releasing means for their associated grip blocks, to cause either pair of the grip blocks 44, 44 or 45, 45 to effect movement of the intermediate trough I9 with respect to the reciprocating `trough Il, and also serve `to maintain the intermediate trough `I9 in centered relation with respect to the` extensible portion Il' of the guide frame I2. This prevents the intermediate trough I9 from coming out of engagement with the frame I2 `and prevents supporting and guiding rollers 62, 62 at the forward end of the intermediate trough IS from riding beyond either end of a p-air of guide tracks 63, 55..

The `guide tracks 53, 63 are secured to and extend along opposite outer sides of the forward portion of the extensible portion Il of the frame l2. The rollers 62, 52 have substantially V-shaped engaging faces which are adapted to engage recessed V-shaped fac/es of said guide tracks, and are mounted in brackets E4, 54, depending from opposite side walls 32, 52 of the frame 33 (see Figures l, 3 and 5). The rollers 62, 62 serve to support and guide the forward end of the intermediate trough i9 for reciprocable movement along the extensible portion il of the frame I2 and serve to support the forward end of the extensible portion I1 of the frame I 2` above the ground.`

The fixed portion of the extensible frame I2 includes two outwardly facing parallel spaced longitudinally extending channels 65, 55 connected together by a plurality of longitudinally spaced cross bars 56, 68 as shown in Figures 6 and 7. A connecting frame 5i, which may be a casting, is suitably secured to the insides of the rear portions of said channels 'as by welding, and extends rearwardly therefrom (see Figures 4 and 6). The frame l2 extends rearwardly and downwardly of the channels E5, 55, and abuts and is secured to a laterally swingable supporting frame 69 of the swivel trough It by connecting bolts it, 10. Thesupporting frame 59 serves to support the rear end ofthe extensible frame l2 above the ground and to connect the extensible frame l2 to the swivel trough for lateral movement with respect thereto in a controlled arcuate path. rIihe supporting frame 651s pivotally connected to the base (not shown) of the swivel trough Il?, for movement with respect thereto about a vertical axis in amannerwhich is not herein shown or dseribedsince .it ,is no part of my present invention. i

The extensible portion l1 of the `frame 12in?.

tained in floating engagement with the ground` by the pull of the cables I4, I4, so as to maintain the cables I4, I d close to the ground as shown.

and described in E. R. Bergmann, Patent No.V 2,425,078.

The extensible portion Il. of the frame` I2.is

mounted on the xed portion thereof for recipro.4

cable movement with respect thereto on a pair of rollers ll, Il engaging the insides of the lower outwardly facing anges of the channels 13, I3 and mounted on brackets i9, 'i9 secured to the outer sides of the channels 55, 65, adjacent the forward ends thereof and projecting upwardly therefrom (see Figure 7). Similar brackets 8U, 5S are secured to the outsides of the webs of the channels i3, 'I3 adjacent the rear ends thereof and depend therefrom (see Figuresll and 9). Rollers 8|, SI are rotatably mounted on and extend inwardly from said brackets lill, BIJ and engage the under sides of the upper flanges of said channels 65, 55. sible portion I'l of the frame I2 is thus supported above the ground by th-e intermediate trough I9 on the rollers 52, 52 and the extensible portion Il of the frame I2 supports the xed portion thereof above the ground on the rollers l1, 'il and BI, 8|.

A ratchet device 33 mounted on the reciprocating trough Il, is provided to extend the extensible portion il of the frame I2 by the action of the conveyor. rlhe ratchet device 33 includes two laterally spaced dogsiil, 84 extending along the insides of the channels i3, 73 and connected to operate together by means of a member 85 (see Figure 5). Each of the dogs 54 is transversely pivoted adjacent its rear end to a clevis 56 on a guide rod 57 at a pivotal pin S3. The

guide rod 5l is slidably guided in the reciprocating trough I I on longitudinally spaced guides t9- and 55, projecting outwardly from the sides of the reciprocating trough Il, beneath the topr thereof (see Figures 3 and 5).

The guide rod 5l is encircled by a compression spring 5I disposed between the guides 85 and 5t and abutting the guide 95 at one of its ends and a collar 52 at its opposite end, which collar abuts a shouldered portion of the guide rod 8l as shown in Figure 3. The springs 9| encircling said guide rods 5l, El are normally loaded to such an extent that they act as solid members and only yield when the extensible .portion Il of the frame I2 is held from advancing movement by an obstruction. Lock nuts 94, Se, threaded on each of the guide rods is? and abutting the rear ends of the guides 55, 95, serve to hold the rods 5l to the guides 95 and serve as an adjusting means to preload the springs 9 i.

A separate spring 56 serves to urge each dog 34 into position to engage the cross bars 14, "I4 and tc yieldably restrain upward movement of said dogslsee Figures 3 and` 8). Each of said springs is disposed between the arms of the clevis 85 of the guide rod t7, and is interposed between a bottomvpiece `ill Vformed inthe `clevis 35 and la The oating forward end IS of the The forward end of the extenrearwardly projecting end 99 of the dog 84. An eccentric mounted in a bracket |0| on the left-hand side of the device when looking towards its forward end, is provided to move the dogs 04 out of position to engage the cross bars 74, 74. The bracket |0| is herein shown as being recessed within an outer left-hand side wall of the trough II. The eccentric |00 is secured to a pin |03 and engages the top surface of the rearwardly projecting end 99 of the left-hand dog 84, for moving both of said dogs into an elevated position out of engagement with the cross bars 74, 74 when pressure is relieved from said dogs during a return stroke of the conveyor. A hand lever |04 suitably secured to the outer end of the pin |03 is providedto operate the eccentric |00. A detent |05 of a well known form of spring-pressed ball type is provided to index said eccentric in its various operative positions.

The cross bars 74, 74 are spaced apart distances equal to twice the lengths of the stroke of the conveyor, and the dogs 84, 94 have two longitudinally spaced engaging portions |96 and |07, spaced apart distances equal to the length of the stroke of the conveyor. |00 is in position as shown in Figure 3, the dogs 84, 34 will engage the cross bars 79, 74, and during operation of the conveyor during the forward strokes thereof, the engaging portions |07, |07 of the dogs 34, 84 will rst engage a cross bar 14 and move the extensible portion I7 of the frame I2 a distance equal to the length of the forward stroke of the conveyor. During the next forward stroke of the conveyor the engaging portions |06, |06 of the dogs 94 will engage the same cross bar and again advance the extensible portion I7 of the frame I2 a distance equal to the length of the forward stroke of the conveyor. During the third forward stroke of the conveyor the engaging portions |07, |07 will engage the next succeeding cross bar 74 and so on until the extensible portion I7 of the extensible frame I2 has been extended to the desired extent.

Means are provided to hold the extensible portion I7 of the frame I2 from backward sliding movement which includes a holding dog |09 pivotally mounted on the inner side of the lefthand channel 73 and having downwardly facing engaging portions I0 and I I adapted to progressively engage the cross bars 66, 69 (see Figure 4). The cross bars 69, 66, like the cross bars 74, 14, are spaced apart distances equal to twice the length of the stroke of the conveyor and. the engaging portions I I0 and I I of the holding dog |69 are spaced apart distances equal to the stroke of the conveyor so rst one engaging portion and then the other will engage the same cross bar, to hold the frame I2 from retractible movement as it is being extended and when it is in various desired extended positions.

The holding dog |09 is pivotally mounted on a transverse shaft |I4 at its inner end. The shaft I|4 is secured to and extends inwardly from a support member H5 mounted on the outer side of the web of the channel 95, between the flanges thereof (see Figure 13). The member I I5 is of a substantially U-shaped formation in plan, with the open portion thereof facing the web of the channel 6'5. The web of the channel 65 is cut away adjacent the open portion of the member I I5 to receive two abutting tension members I I9, II'I and to receive a boss H8 formed integrally with the holding dog |09 and extending outwardly therefrom. Y

The boss-H8 has two spaced apart abutment Thus when the eccentric surfaces IIS, |20 which extend upwardly therefrom, and between which extend engaging surfaces |2|, |22 of the tension members ||6 and I I7, respectively (see Figure 11). A longitudinally extending compression spring |23 is interposed between said engaging surfaces. The tension members II6 and I|7 also have outward projections |24, |25 extending through a slot |26 at the upper end of a lever arm |27 of a bell crank |29 and are held in engagement with opposite sides of the slot |26 by means of the compression spring |23. The bell crank |29 is pivotally mounted on the outer end of the shaft II4 and has another lever arm |30, which is apertured adjacent its outer end, to receive an eccentric disk |3I. Said eccentric disk is threaded on a pin |32 secured to the support member IIE and projecting outwardly therefrom. A nut |93 is provided to lock said eccentric from movement with respect to Said pin, and a hand lever |34 is provided to turn said eccentric and move said bell crank from the position shown in Figure l2 to the position shown in Figure 13. A hand grip |35 extends outwardly from the lock nut and is provided to turn said nut |33 to a locked or a released position.

When the hand lever |34 is in the position shown in Figure l2, the upright lever arm |27 of the bell crank |29 will be moved to the right. This will move the engaging surface |2| of the tension member ||6 to the right and will cause the spring |23 to exert a force in a direction to yieldably hold the holding dog |09 in position to engage the cross. bars 66, 06, as the extensible portion I7 of the frame I2 advances along the channels 65, 65, and hold the extensible portion I7 of the frame I2 from retractible movement.

When the hand lever |34 is in the position shown in Figure 13, the upright lever arm |27 of the bell crank |29 will be moved to the left. This will move the engaging surface |22 of the tension member i7 to the left and cause the spring |23 to exert a force inthe same direction. When the hand lever |34 is in this forwardly inclined position, the spring |23 will lift the holding dog |09 by means of the bell crank |29 out of position to engage the cro-ss bars 66, 66 upon la. forward stroke of the conveyor, when pressure is relieved from the engaging portion II Yof the holding dog |09.

The loading operation is started with the frame I2 and extensible trough 20 and intermediate troughs I9 in retracted relation with respect to each other. The extensible trough 20 may then be extended by the feeding device 24 while being moved from side to side by the cables I4, I4 until one working place has been loaded out. During the operation of loading the next working place the extensible trough 20 may again be extended. At the end of this second loading operation, the

extensible trough 20 is usually extended for itsv full length. After the second loading operation the extensible trough 29 may then be fully retracted by the operation of the conveyor. The hand lever |94 may then be moved to a rearward position, whereby the dogs 84, 84 will engage the cnoss bars 74, 74 during the forward strokes of the conveyor, to extend the extensible frame I2 by the action of the conveyor. At the same time the hand lever |34 may be moved to the rearward position shown in Figure l2 whereby the holding dog |09 will progressively engage the cross bars 69, 69 of the stationary part of the extensible frame I2, during extension of said frame, to hold said frame from retractible movement.

During extension of the frame I2, thestops 59, 59 willbe moved into engagement with the lugs 55, 55 of the carrier member 41. This will release the grip blocks 45, 45 from the bearing plates 36 during the forward strokes of the conveyor, to extend the intermediate through I9 by the action of the conveyor.

When the frame I2 has been extended to the desired extent, the hand lever |04 is rocked to a 'forward position during a return stroke of the conveyor to disengage the dogs 84, and 84 from the cross bars 14, 14. The hand lever I34 is left in a rearward position whereby the holding dog |09 will hold the frame I2 in an extended position. The troughs II and I9 reciprocablymoving back and forth will be centered with respect to the frame I2 and stops 58, 58 and 59, 59 by engagement of the lugs 55, 55 with the stops V59, 59 during the return strokes of the conveyor. This will disengage the grip blocks 45, 45 from the bearing plates 36, 36 and will cause the grip blocks 44, 44 to engage the bearing plates 36 to advance the intermediate trough I9 until the stops'59, 59 no longer engage the lugs 55, 55, at which time the lugs 54, 54 and 55, 55 will be Vcentered between the stops 58, 58 and 59, 59, and the intermediate trough I9 will be centered with respect to the extensible frame I2.

When it is desired to retractibly move the extensible frame, the hand lever |04 is moved into a forward position, to raise the dogs 84, 94 out of engagement with the cross bars 14, 14. The hand lever |34 is also moved into the forward position shown in Figure l2, to compress the spring I 23 to rock the holding dog |09 out of `engagement with the cross bar 56 during a forward stroke of the conveyor, when pressure is relieved from the holding dog |09. The cables I4, I4 are then trained rearwardly around the sheaves I5, I and are attached at their free ends to a stationary part of the frame I2. Power is then applied to the winding drums for 'said cables, to wind in said cables and retractibly move the extensible frame I2.

While I have herein shown and described one form in which my invention may be embodied, it will be understood that the construction there- `of and the arrangement of the various parts may be altered without departing from the spirit and scope thereof. Furthermore, I do not wish to be construed as limiting my invention to the specific embodiment illustrated, excepting as it may be limited in the appended claims.

vI claim as my invention:

1.In a self-loading device for shaker conveyors having reciprocating trough sections, an extensible trough having a pick-up member at its forward end, for picking up loose material `from the ground, va reciprocating trough, a nonreciprocating frame `extending along opposite sides of said extensible and reciprocating troughs andforming a guide means therefor, said frame including two frame portions one `of which is extensible with respect to the other, and means mounted 'on said reciprocating trough and selectively operable to engage said extensible portion ofsaid frame during the forward strokes of the conveyor, to positively extend said frame by the reciprocating action of the conveyor.

`2. In a self-loading device for shaker conveyors havinglreciprocating trough sections, an extensible trough having a pick-up member at its forward end, for picking up loose material from theground,ia reciprocating trough, a non-reciprocating frame extending'along opposite -sides of l0 said extensible and reciprocating troughs, said frame including a xed frame portion and an extensible frame portion movable with respect to said fixed frame portion, and ratchet means mounted on said recip-rocating trough and selectively operable to engage said extensible portion of said frame during the forward strokes of `the conveyor, to positively extend said frame by the reciprocating 'action'of the conveyor, andother ratchet means mounted on the extensible portion of said frame and selectively operable to engage the Vfixed portion of said frame for holding said frame in its various desired extended positions.

3. In 'a self-leading device for shaker conveyors and in combination with an extensible trough having a pick-upmember'at its forward end, `for picking up loose material from Athe ground, fa reciprocating trough, `a non-reciprocating `frame extending along opposite sides of said extensible and reciprocating troughs and forming a guide means therefor and also formingareaction member for said troughs for moving said troughs laterally, upon lateral movement of said frame, said frame including two frame portions one of VWhichis extensible with respect to the other, a plurality of transversely extending parallel spaced bars spaced along said extensible portion of'said frame, and ratchet means mounted on said reciprocating trough and including a dog operable to progressively'engage said bars upon the forward `stroke of the conveyor, to positively extend said extensible portion of said frame, and other ratchet means including aholding dog pivotally mounted on one portion of said frame and selectively operable to engage `said otherportion of said frame, to hold said frame in its various desired extended positions.

e. In a self-'loading device forl shaker conveyors, and in combination with a swivel trough on the end of a shaker conveyor trough line and reciprocably driven therefrom, a reciprocating trough connected to'the end of said swivel trough for'lateral movement with respect to thetrough line and reciprocably Ydriven vfrom said 'swivel trough, an intermediate trough connected to Said `reciprocating trough for extensible movement lwith respect thereto, means for recipro- Icably driving `said'internfiediate trough from said reciprocating trough vand for extensibly or retractibly moving said swivel trough with respect to said reciprocating trough, an extensible trough mounted for extensible or retractible movement withrespect tofsaid intermediate trough, a nonreciprocating frame extending along said troughs and forming a guide Vmeans therefor and also forming areaction member for said troughs, for moving said troughs laterally upon lateral movement of said frame about said swivel trough, said frame including a non-extensible portion connected at its rear end for lateral movement with swivel trough, and an extensible portion mounted for extensible or retractible movement w o respect to said non-extensible portion of said frame, and means operable byireciprocable movement of the conveyor for extending said frame, and to cause extension of said intermediate trough along said reciprocating trough and to provide for extension of said extensible trough for a greater distance than its length without inserting additional troughs in the trough line.

5. In a self-loading device for shaker conveyors, and in combination with a swiveltroughon the. end of a-shaker conveyor trough line and reciprocably Y driven therefrom, a reciprocating trough connected to the end of said swivel trough for lateral movement with respect to the trough line and reciprocably driven from said `swivel trou-gh, an intermediate trough connected to said reciprocating trough for extensible movement with respect thereto, means for reciprocably driving said intermediate trough from said reciprocating trough and for extending or retracting said intermediate trough with respect to said reciproacting trough, an extensible trough mounted for extensible or retractible movement with respect to said intermediate trough, `a non-reciprocating frame extending along said troughs and forming a guide means therefor and also forming a reaction member for said troughs, for moving said troughs laterally upon lateral movement of said frame about the axis of said swivel trough, lSaid frame including a non-extensible portion connected at its rear end for lateral movement with said swivel trough, and an extensible portion mounted for extensible or retractible movement with respect to said non-extensible portion of said frame, and means operable by reoiprocable movement of the conveyor for extending said extensible portion of said frame, and to cause extension of said intermediate trough along said reciprocating trough and provide for extension of said extensible trough for a greater distance than its length, including ratchet means mounted on said reciprocating trough and selectively operable to engage said extensible portion of said frame during the for- Ward strokes of the conveyor.

6. In a self-loading device for shaker conveyors, and in combination with a swivel trough on the end of a shaker conveyo-r trough line and reciprocably driven therefrom, a reciprocating trough connected to the end of said swivel trough for lateral movement with respect to the trough line and reciprocably driven from said swivel trough, an intermediate trough connected to said reciprocating trough for extensible movement with respect thereto, means for reciprocably driving said intermediate trough from said reciprocating trough and for extending or retracting said intermediate trough with respect to said reciprocating trough, an extensible trough mounted for extensible or retractible movement with respect to said intermediate trough, a non-reciprocating frame extending along said troughs and forming a guide means therefor and also forming a reaction member for said troughs, for moving said troughs laterally upon lateral movement of said frame about the axis of said swivel trough, said frame including a non-extensible portion connected at its rear end for lateral movement with said swivel trough, and an extensible portion mounted for extensible or retractible movement with respect to said non-extensible portion of said frame, and means operable by reciprocable movement of the conveyor for extending said extensible frame portion, and to cause extension of said intermediate trough along said reciprocating trough and provide for extension of said extensible trough for a greater distance than its length, including a dog pivotally mounted on said reciprocating trough, and means selectively operable to cause said dog to engage said extensible portion of said frame during the forward strokes of the conveyor.

7. An extensible guide means for the reciprocating and extensible troughs of a shaker conveyor, for guiding said troughs in a rectilinear path and for moving said troughs about a pivot point during reciprocation thereof and providing for extension of said extensible trough beyond its length including a non-reciprocating frame having a xed portion mounted yat its rear end for movement about a vertical pivot point and having an extensible portion mounted for extensible and retractible movement with respect to said fixed portion, and means driven by the conveyor in its reciprocating movement for extending said frame including a ratchet device selectively operable to engage said extensible portion of said frame during the forward strokes of the conveyor.

8. An extensible guide means for the reciprocating and extensible troughs of la shaker conveyor, for guiding said troughs in a rectilinear path and for moving said troughs about a pivot point during reciprocation thereof and providing for extension of said extensible trough beyond its length including a non-reciprocating frame having a fixed portion mounted at its'rear end for movement about a iixed vertical pivot, and having an extensible portion mounted for extensible and retractible movement with respect to said iixed portion, and a ratchet device driven by the conveyor in its reciprocating movement to extend said frame including a dog reciprocably movable with the conveyor, means for controlling operation of said dog and movable into position to disengage said dog from said extensible portion of said frame or to cause said dog to engage said extensible portion of said frame during the forward strokes of the conveyor.

9. An extensible guide means for the reciprocating and extensible troughs of a shaker conveyor, for guiding said troughs in a rectilinear path and for moving said troughs about a pivot point during reciprocation thereof and providing for extension of said extensible trough beyond its length including a non-reciprocating frame having a fixed portion mounted at its rear end for movement about a vertical pivot point, and having an extensible portion mounted for extensible and retractible movement with respect to said fixed portion, a ratchet device driven by f the conveyor in its movement for extending the extensible portion of said frame including a dog reciprocably movable with the conveyor, means for controlling operation of said dog and movable into position to disengage said dog from said extensible portion of said frame or to cause said dog toV engage said extensible portion of said frame during the forward strokes of the conveyor, and another ratchet device including a holding dog pivot-ally mounted on said extensible portion of said frame and selectively operable to engage said fixed portion of said frame, to hold said frame in its various desired extended positions.

10. An extensible guide means for the reciprocating and extensible troughs of a shaker conveyor, for guiding said troughs in a rectilinear path and for moving said troughs about a pivot point during reciprocation thereof and providing for extension of said extensible trough beyond its length including a non-reciprocating frame having a xed portion mounted at its rear end for movement about a vertical pivot point, and having an extensible portion mounted for extensible and retractible movement with respect to said xed portion, a ratchet device driven by ythe conveyor in its movement for extending said frame including a plurality of transversely extending parallel bars spaced along said extensible portion of said frame, a dog reciprocably movable with the conveyor, means selectively operable to cause said dog to progressively engage said bars upon the forward strokes of the conveyor, to positively extend said extensible portion of said frame, and to move said dog into a diseng-aged position with respect to said bars, and another ratchet device for `holding said frame in its various desired extended positions.

ll. In a self-loading device for shaker conveyors including a reciprocating trough section, an extensible trough, a non-reciprocating frame extending along said extensible trough, said frame including an extensible frame portion and having an intermediate trough section mounted thereon and extensible with respect thereto and. in material-receiving relation with respect to said extensible trough, means connected with said reciprocating trough section for engagement with said extensible frame portion for ex tending the latter responsive to reciprocation of said reciprocating trough section, and means for extending the intermediate trough section responsive to extension of said extensible frame portion.

l2. In a self-loading device for shaker conveyors including a reciprocating trough section, an extensible trough, a non-reciprocating frame extending along said extensible trough and forming a guide means therefor, said frame including an extensible frame portion and having an intermediate trough section mounted therein and extensible with respect thereto and in material-receiving relation with respect to said extensible trough, ratchet means connected with said reciprocating trough section for movement therewith and for engagement with said extensible frame portion during altern-ate strokes or the conveyor to extend the latter responsive to reciprocation of said reciprocating trough section, and means for extending the intermediate trough section responsive to extending movement of the extensible frame portion.

13. In a self-loading device for shaker conveyors including a reciprocating trough section, an extensible trough having a, pick-up member at its forward end, a non-reciprocating frame extending along opposite sides of said extensible trough and forming a guide means therefor, said frame also including an extensible frame portion and having an intermediate trough section mounted therein and extensible with respect thereto and in material receiving relation with respect to said extensible trough, to provide for extension of said extensible trough for a greater dist-ance than its length, and ratchet means mounted on said reciprocating trough section for engagement with said extensible frame portion and operable by reciprocating movement of the conveyor for extending said extensible frame portion, including a plurality of parallel spaced bars extending transversely of said extensible frame portion and secured to a portion thereof, and a dog mounted on said reciprocating trough section for engagement with said parallel spaced bars and reciprocably movable with the conveyor, and means selectively operable to move said dog into position to engage said b-ars during alternate strokes of the conveyor.

14. In a self-loading device for shaker conveyors including a reciprocating trough section, :an extensible trough having a pick-up member at its forward end, a non-reciprocating frame extending along opposite sides of said extensible trough and forming a guide means therefor, said frame also having an extensible frame portion carried by a non-extensible portion thereof and having an intermediate trough section mounted therein and extensible with respect thereto and in material-receiving relation with respect to said extensible trough, to provide for extension of said extensible trough for a greater distance than its length, and ratchet means cooperating with said reciprocating trough sections, for extending said extensible frame portion, including a plurality of parallel spaced bars extending transversely of said extensible frame portion and se cured to a portion thereof, a dog mounted on said reciprocating trough section for engagement with said parallel spaced bars and reciprocably movable with the conveyor, and means operable to selectively position said dog to engage said bars during alternate strokes of the conveyor, land a holding dog mounted on said extensible frame portion for engagement with said non-extensible portion to hold said extensible frame portion in its several desired extended positions.

15. In a self-loading device for shaker conveyors including a reciprocating trough section, an extensible trough having a pick-up member at its forward end, a non-reciprocating frame extending along opposite sides of said extensible trough and forming a guide means therefor, said frame also having an extensible frame portion and having an vintermediate trough section mounted therein and extensible with respect thereto and in material receiving relation with respect to said extensible trough, to provide for extension of said extensible trough for a greater distance than its length, and ratchet means cooperating with said trough sections for extending said extensible frame portion, including a plurality of parallel spaced bars extending transversely of said extensible frame portion and secured to :a portion thereof, a dog pivotally mounted on said reciprocating trough section and reciprocably movable with the conveyor, and means selectively operable to pivot said dog into position to engage said bars during alternate strokes of the conveyor, a plurality of parallel spaced bars secured to a non-extensible portion of said frame and spaced therealong, and a holding dog secured to said extensible frame portion and adapted to engage said second mentioned bars on said non-extensible portion of said frame, to hold said extensible frame portion in its several desired positions of extension.

JOHN H. HOLSTEIN.

REFERENCES CITED The following references are of record in the nle of this patent:

UNITED STATES PATENTS Number Name Date 2,165,583 Sloane July 11, 1939 2,280,043 Hagenbook Apr. 14, 1942 

